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GENERALINFORMATIONINFORMATIONGENERAL� Hose information is subject to change. For full details, visit our website or contact Customer Service. FACTORS AFFECTING HOSE STEAM HOSE WARNING Steam heat is hotter than boiling water (212�F, 100�C) and SERVICE LIFE increases in temperature as pressure increases. The danger from All hose has a limited life for a given application. This is true steam in industrial applications is due to the great heat and even if the proper hose has been selected for the application; it ispressures involved. Water changes to steam at higher temperatures used within rated pressures, temperatures and environmental con- when under pressure. If the steam escapes, massive quantities of ditions; and it is properly inspected and maintained. This is becauseheat are released. This, combined with high pressures, can prove the elastomers and reinforcement used to construct the hose will to be dangerous for the operator. Use only steam hoses break down over time and with use. In addition, there are a number designed for these applications. A steam hose should never of factors that can adversely affect the service life of a hose. Thebe used to carry pressures or temperatures higher than it is major ones are: rated to handle, in spite of any safety factor. 1. External Abuse � Kinking, bending, high end pull, crushing, abrasion, exceeding the recommended minimum bend radius, STEAM CHART exposure to chemicals and other abuse or damage will reduce the service life and performance of you hose. This may be the 450 case even though the hose may appear to be undamaged from exterior appearance. Hoses should not be stretched, run over by equipment, or used to hoist, carry or pull objects. Hoses should not be bent beyond recommended minimum bend 400 radius. This could result in kinks which could increase pressure Super- and hose damage that could reduce pressure resistance. heated Large diameter hoses may require additional support to reduce stretching, kinking and external abuse. Steam 350 2. System Pressures � Never use hose at pressures that exceed its ratings. A system (or device or application) can X have varied pressures caused by source, operator action or mechanical components. It is the responsibility of the purchaser or user to accurately determine the maximum system pressure. 300 �FTemperature, Steady state pressure can be measured readily by gauges. Surge pressures are difficult to measure and may require the Hot use of electronic pressure sensing devices. "Hammer effects" Water refers to sudden blockage or stoppage of the system that causes pressure spikes. This can damage or even cause 250 catastrophic failure of the hose or system. 3. High Temperatures � Never use hose at temperatures that exceed its ratings. High temperatures can degrade a hose very quickly, resulting in shortened service life. The allowable 200 temperature ranges for the Thermoid hoses are shown on the 0 50 100 150 200 250 following pages. These are for internal product temperatures Gauge Pressure, psi and assume external or ambient temperatures do not exceed the recommended working temperature of the fluid. Where The dotted line shows the process of saturated steam being external temperatures are higher than these ranges, contact transformed into superheated steam. If a steam line is at a your HBD/Thermoid Customer Service Representative for pressure of 150 psi, and a temperature of 366�F, it contains recommendations. Fluid and environmental temperatures saturated steam. If the pressure is substantially reduced by the that are high, but within working temperature of hose, still shorten hose life. expansion of the steam (such as the sudden opening of a valve or the steam passing into a larger pipe or hose), the condition 4. Low Temperatures � Never use hose at lower temperatures of the steam follows the dotted line to some point X in the than recommended. Doing so could cause the hose to crack superheated steam area. This condition may not last very or break. long, but the superheated steam tends to deteriorate the tube 5. Misapplication � HBD/Thermoid designs and supplies a stock in ordinary steam hose intended for use with saturated variety of hoses. Always select the right hose for the steam. This usually results in hose failure. application. HBD/Thermoid disclaims liability for misapplication of its product. Contact your HBD/Thermoid Customer Service Representative for application assistance. 6. Internal Abrasion � Applications involving abrasive fluids, particularly where the hose makes one or more bends, will reduce the service life of the hose. 7. Flexing and Vibration � Flexing, twisting, vibration or other movement of the hose may shorten service life. 8. Modifications to the Hose � Repairing the hose, improperly coupling or re-coupling of the hose, or use of inappropriate fittings and other modifications to the hose will shorten service life and possibly cause immediate failure. 9. Improper Installation � Installing hose assemblies in a manner where the hose is subjected to a torqued condition (twisted layline), will reduce the life of the hose significantly. 8
Goodyear Rubber Products
